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There's a bigger-than-usual episode of "The Big Bang Theory" (7 p.m., CBS/Ch. 2), as Bernadette (Melissa Rauch) gives birth — adding a baby to the "Big Bang" mix.

Oh, and it's Amy's (Mayim Bialik) birthday, which means it time for her annual coitus with Sheldon (Jim Parsons).

Love this show, but this does not turn out to be one of its better episodes.

Elsewhere on TV …

• NFL (6:25 p.m., NBC/Ch. 5 and NFL Network): Los Angeles Rams at Seattle Seahawks

• "iHeart Radio Jingle Ball 2016" (7 p.m., CW/Ch. 30): Elvis Duran hosts; scheduled performers include Justin Bieber, Ariana Grande, Diplo, The Chainsmokers, Fifth Harmony, Charlie Puth, Lukas Graham, DNCE, and Niall Horan.

• "Project Runway" (7 p.m., Lifetime): Part 1 of the season finale.

• "The Great Indoors" (7:30 p.m., CBS/Ch. 2): Jack regrets convincing Human Resources to toss out a "no inter-office dating" rule when he needs an excuse to break up with a co-worker.

• "Mom" (8 p.m., CBS/Ch. 2): Christy and Bonnie dip back into illegal activities.

• "The Great American Baking Show" (8 p.m., ABC/Ch. 4): It's pies and tarts week.

• "Life In Pieces" (8:30 p.m., CBS/Ch. 2): Colleen goes wedding dress shopping with her future in-laws; Clementine starts being extra nice to Tim, who takes it the wrong way.

• "Pure Genius" (9 p.m., CBS/Ch. 2): The Bunker Hill surgical team tries to make medical history with the largest chain of kidney donations ever.

• "Gangland Undercover" (11 p.m., A&E): Falco finds himself working alongside an uptight and single-minded ATF agent.

• "Top Chef" (11 p.m., Bravo): Contestants are divided into two teams and compete to create a seven-course progressive meal in which each dish features the same ingredient — the radish.

• "Falling Water" (11 p.m., USA): Taka, Tess and Burton converge on the Boy.